查询词典 fractional distillation

Therefore, fractional distillation must be used in order to separate the components well by repeated vaporization-condensation cycles within a packed fractionating column.

因此，为了很好地分离各组分，必须通过在一个填充分馏柱内不断重复汽化－冷凝周期的方法进行分馏。

Obtained by fractional distillation of liquefied air, it is used in luminescent tubes, flash lamps, lasers, and tracer studies and as an anesthetic.

用于频闪仪和高摄影术所用的极短促而强烈的闪光灯中。氙闪光灯已用于活化红宝石的激光器。仅与氟和氧化合生成。

Obtained by fractional distillation of liquefied air, it is used in luminescent tubes, flash lamps, lasers, and trace r studies and as an anesthetic.

用于频闪仪和高摄影术所用的极短促而强烈的闪光灯中。氙闪光灯已用于活化红宝石的激光器。仅与氟和氧化合生成。

A colorless, flammable liquid, C6H14, derived from the fractional distillation of petroleum and used as a solvent and as a ''.

已烷一种无色可燃液体，c6h14，从石油的分馏中提取，用作溶剂和低''。

A colorless, flammable liquid, C6H14, derived from the fractional distillation of petroleum and used as a solvent and as a working fluid in low-temperature ''.

已烷一种无色可燃液体，c6h14，从石油的分馏中提取，用作溶剂和低温度气压计中的工作流体

The sample can be admitted to the ion source only after it is completely vaporized, otherwise,the result of masurement will be severly distorted by fractional distillation.

用接近于待测样品中所含的卤代烃的杂质样品与纯净六氟化铀可配置出已知卤代烃含量的"杂质标样"。

Obtained by fractional distillation of liquefied air, it is used in luminescent tubes, flash lamps, laser s, and tracer studies and as an anesthetic.

用于频闪仪和高摄影术所用的极短促而强烈的闪光灯中。氙闪光灯已用于活化红宝石的激光器。仅与氟和氧化合生成。

Hexane: A colorless, flammable liquid, C6H 14, derived from the fractional distillation of petroleum and used as a solvent and as a working fluid in low-temperature thermometers.

已烷：一种无色可燃液体，C6H 14，从石油的分馏中提取，用作溶剂和低温度气压计中的工作流体

The second variation type is called reversion evolution type, which represents the liquid segregation mainly with vapour-liquid fractional distillation. The third variation type is called saltatory variation type, which is formed from the liquid segregation mainly with immiscibility.

称为正向演化类型，是结晶分异结果；②称为反向演化类型，代表气液分馏为主的液态分离；③称为演化突变类型，是不混溶为主的液态分离形成。

During the course of the experiment, the student will be exposed to fractional distillation under vacuum, gas chromatography, refractometry, polarimetry, and IR absorption spectroscopy.

气相色层分析，折光率的测定，旋光度的测定和红外吸收光谱。

Methods: Five patients with parkinsonism or dystonia were assigned to general anesthesia using an modified endotracheal tube.

本实验依照人体实验之相关规定进行，五位患有帕金森氏症或肌张力异常的病人接受神经立体定位手术。

If you can benefit from this book, it is our honour.

如果您能从本书获益，这将是我们的荣幸。